From the cross A b c / a B C × a b c / a b c, how many double crossovers would be expected out of 1000 progeny?
The map of a chromosome interval is:
A——10 m.u.——B——40 m.u.——C
A) 5
B) 10
C) 20
D) 40
E) 80
D) 40
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In marine turtles, excess salts are removed by:
a. salt glands in the tongue. b. salt glands above the eyes. c. concentrated urine. d. salt glands on the skin. e. salt glands in the nose.
Nitrogen-fixing bacteria, in the roots of soybeans, help provide a source of nitrogen to the plants. In exchange, the bacteria obtain food from the plants. The bacteria are converting
A. ammonium (NH4) to nitrate (NO3). B. nitrate (NO3) to ammonium (NH4). C. nitrogen gas (N2) to nitrate (NO3). D. nitrogen gas (N2) to ammonium (NH4). E. nitrate (NO3) to nitrogen gas (N2).
what disease does HPV cause?
What will be an ideal response?
How many turns of the Calvin cycle are needed to make one glucose molecule?
A. 2 B. 3 C. 5 D. 1 E. 6